Production of effects on mixed goods composed of cotton and wool.



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GEORG RUDOLPH, OF ELBERFELD, GERMANY, .isnicxon 'r mnsmlolsnincwvoRM.

FHIEDR. BAYER & 00., or ELBERFELD, GERMANY. A coaroaw m: or GERMANY.

PRODUCTION OF EFFEGTS OI MIXED GOGDS COZKPOSED OF CQTTON AND WOOL.

Fatented Dec. 10, 1907.

Application filed April 18, 1907- Serial 110. 368,987.

To all whom it may concern:

Be it known that I, GEORG R unonrn, citizen of the German Empire, residing at Elberfeld, Kingdom of Prussia, Germany, have invented new and useful Improvements in Production of Effects on Mixed Goods "(lom 'soscd of Cotton and \Vool, of which the following is a specification.

It has hitherto not been possible to dye half-woolen goods with sulfur coloring matters in such a way that the wool fiber remained undyed. I have now discovered that wool after treatment with chromium compounds looses almost completely its aifinity for sulfur dyes. On dyeing with sulfur dyes mixed fabrics consisting of cotton and wool in which the wool has been treated with chromium compounds, the wool will remain practicall white and it maybe dyed afterwards with suitable coloring matters. The wool may he dyed and mordanted before spinning or weavin with cotton. Cotton cloth with white or colored woolen threads 2. g. a cotton cloth with white or colored edges or lists can thus be obtained.

For the dyeing with sulfur colors it is ad visable, to employ a method which does 7 cl impair thestrength of the animal fiber. a or this purpose the process of dyeing may be used which is described in- German Let Patent 173685 and according to which 1 is mixed goods are dyed in a dyebath contain.- ing the sulfur dye, sodium sulfid and salts of organic acids possessing a reducing e. g. formic acid, lactic acid, or the like. ouch a dye-bath is not detrimental to the wool and the protectin action of the compounds is urther increased by the lactic acid etc.

'White effects can be obtained e. g. by using chrome-mordanted Wool as list-yarn for cotton piece goods and dyeing the mixed goods as above stated. Mixed'colored eli'ects can be obtained b d ein wool chromiin it after b l {a chromium black TW extra,

ed sodium sulfid, l a

600 13309 grams of 1500-2401! The goods are entered at 2025 C and dyed for from 1 to 1" hours at th1stemperature, rinsed in water and then in a dilute acetic acid solution. instead of chromins the wool fabricby itself, it can be chromed ai'ter having been spun or interwoven with cotton. In both black cotton cloth with while ell-cots obtained. Of course other sulfur colon 1g matters can be used. To obtain mixed colored the. wool he- 'for'e or after chroming may be d ed with suitable coloring matters, 6. g. anthracene yellow C, ai'rid authrccene red 3 B, benzo st red FL", brillnt wool blue B'extra, al l ra. This may done ,iin" lg or weavin with u or after, and in the latter cascbefore clng wi' The sulfur 'oloringfarirgated eil cts can be obtained 1 using wool dyed in dilierent colors.

i do not confine myself to the particulars en in the above ex which re. merely sis an. can be vane- Tl -within de limits Julwut altering thereby the nature of the above invention.

Having now described my invention and in Wl'uttnianner the same is to be performed, l declare that what I claim is 1. The process of producing variegated colored oll'X-ts on 'l'abrics composed of cotton and wool, which consists in ohroming the wool and then dyeing the fabric with sulfur dyes. the chromed wool resisting the action theieol and remaining uncolcred, substantially {H ll'fii lll/ fll.

eillieer below the scottc :ffilid woolfwhieh cbhists in chroming the in teetim'ony whereof I have hereunto set {who and then dyeing the fabrie'with sulfur my hand'in the presence of two subscribing ldyes, the chromed W001 resistin the action witnesses. thereof and remaining uhcolore and then C GEORG RUDOLPH. [L. s.] pyrdyeiii the-fahrieegrith any of the .colors or- Witnesses:

'dma'n y 'emplo. ed for W001 dyeing, substa'n- OTTO K6NIG, many as descri ed. V E t; J. A. RITTERsHAUs. 

